太极动作中关节的特别作用。 因为它们能动，他们可以被看作固体的或者流体的。你可以选择让一个关节动（开/合/转），也可以让一个关节不动，作为你的刚性的结构中的一个固定点。

从劲路上看，关节可以在劲路上，也可以瞄着劲路。关节给了手在不动的情况下划圈的可能，也使身体在划圈的时候不晃。让我们用一套关节划半个圈，另一套关节划另半个圈。

你经常被问划圈时肘的位置。连在肋上吗？是胯驱使的吗？肩膀能前后动吗？
你的套路打得好不好看不要在意。相反，多多关照一下你的关节是怎么动的，或者是怎么不动的。

Joints are special in Tai Ji movements. They can be viewed as solid or fluid because they can move. You can choose to move(open/ close/ rotate) a joint or fix(lock) it as a dot or as part of your rigid structure.

In term of alignment, the joints are made to be on the line or aiming at it.
The joints make it possible for the hand to draw a positive circle without the hand moving and body tossing. Allow you to make one half of a circle with one set of joints and complete the other half by another set of joints.

You are frequently asked about your elbow position. Is it tied to the ribs? Driven by your Kua? Are you allowed to move your shoulder upwards or backwards?
Pay no attention on how beautiful your Form look. Instead, pay attention on how you move or don’t move your joints.